A charge device coupled to an external device is provided. A connection port is configured to couple to the external device and includes a first pin and a second pin. A battery unit has a battery voltage. A conversion unit converts the battery voltage to provide power to the external device. When the battery voltage is higher than a threshold value, a detection control unit directs the first and second pins to couple to a first charge unit and the connection port outputs a first charge current to the external device. When the battery voltage is not higher than the threshold value, the detection control unit directs the first and second pins to couple to a second charge unit and the connection port outputs a second charge current to the external device. The first charge current is greater than the second charge current.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A charge device coupling to an external device, comprising: a connection port configured to couple to the external device and comprising a first pin and a second pin; a battery unit having a battery voltage; a conversion unit converting the battery voltage to provide power to the external device; and a detection control unit directing the first and second pins to couple to a first charge unit when the battery voltage is higher than a threshold value, and directing the first and second pins to couple to a second charge unit when the battery voltage is not higher than the threshold value; wherein when the first and second pins are coupled to the first charge unit, the connection port outputs a first charge current to the external device, when the first and second pins are coupled to the second charge unit, the connection port outputs a second charge current to the external device, and the first charge current is greater than the second charge current.
2. The charge device as claimed in claim 1 , wherein the first charge unit directs the first pin to connect to the second pin.
3. The charge device as claimed in claim 1 , wherein the first charge unit executes a first operation for the battery voltage to generate a first voltage to the first pin and generate a second voltage to the second pin.
4. The charge device as claimed in claim 1 , wherein the first charge unit comprises: a first charge module directing the first pin to connect to the second pin; and a second charge module processing the battery voltage to generate the first and second voltages, wherein the detection control unit directs the first pin to couple to the second charge module and detects a level of the first pin, when the voltage level of the first pin conforms to a pre-determined state and the battery voltage is higher than the threshold value, the detection control unit directs the first and second pins to remain coupled to the second charge module, and when the voltage level of the first pin does not conform to the pre-determined state and the battery voltage is not higher than the threshold value, the detection control unit directs the first and second pins to couple to the first charge module.
5. The charge device as claimed in claim 1 , wherein the second charge unit provides a third voltage to the first pin and provides a fourth voltage to the second pin.
6. The charge device as claimed in claim 5 , wherein the second voltage is within 0V˜5V.
7. The charge device as claimed in claim 5 , wherein the second charge unit is a resistor generating the second voltage according to a ground voltage.
8. The charge device as claimed in claim 1 , wherein when the battery voltage is not higher than the threshold voltage, the detection control unit first de-activates the conversion unit and then activates the conversion unit, and when the conversion unit is de-activated, the conversion unit stops converting the battery voltage.
9. The charge device as claimed in claim 1 , wherein when the battery voltage is not higher than the threshold voltage and a limiting value, the detection control unit de-activates the conversion unit to stop converting the battery voltage.
10. The charge device as claimed in claim 1 , wherein the connection port is a USB port.
11. A charge system comprising: a charge device providing a first charge current or a second charge current and comprising: a connection port comprising a first pin and a second pin; a battery unit having a battery voltage; a conversion unit converting the battery voltage; and a detection control unit directing the first and second pins to couple to a first charge unit when the battery voltage is higher than a threshold value, and directing the first and second pins to couple to a second charge unit when the battery voltage is not higher than the threshold value; wherein when the first and second pins are coupled to the first charge unit, the connection port outputs the first charge current, when the first and second pins are coupled to the second charge unit, the connection port outputs the second charge current, and the first charge current is greater than the second charge current; and an external device coupled to the connection port to receive the first or second charge current.
12. The charge system as claimed in claim 11 , wherein the first charge unit directs the first pin to connect to the second pin.
13. The charge system as claimed in claim 11 , wherein the first charge unit executes a first operation for the battery voltage to generate a first voltage to the first pin and generate a second voltage to the second pin.
14. The charge system as claimed in claim 11 , wherein the first charge unit comprises: a first charge module directing the first pin to connect to the second pin; and a second charge module processing the battery voltage to generate the first and second voltages, wherein the detection control unit directs the first pin to couple to the second charge module and detects a level of the first pin, when the voltage level of the first pin conforms to a pre-determined state and the battery voltage is higher than the threshold value, the detection control unit directs the first and second pins to remain coupled to the second charge module, and when the voltage level of the first pin does not conform to the pre-determined state and the battery voltage is not higher than the threshold value, the detection control unit directs the first and second pins to couple to the first charge module.
15. The charge system as claimed in claim 11 , wherein the second charge unit provides a third voltage to the first pin and provides a fourth voltage to the second pin.
16. The charge system as claimed in claim 15 , wherein the second voltage is within 0V˜5V.
17. The charge system as claimed in claim 15 , wherein the second charge unit is a resistor generating the second voltage according to a ground voltage.
18. The charge system as claimed in claim 11 , wherein when the battery voltage is not higher than the threshold voltage, the detection control unit first de-activates the conversion unit and then activates the conversion unit, and when the conversion unit is de-activated, the conversion unit stops converting the battery voltage.
19. The charge system as claimed in claim 11 , wherein when the battery voltage is not higher than the threshold voltage and a limiting value, the detection control unit de-activates the conversion unit to stop converting the battery voltage.
20. The charge system as claimed in claim 11 , wherein the connection port is a USB port.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
January 7, 2015
October 4, 2016
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